The study actually reads like a science fair project, but is no less compelling.

Researchers put teeth into containers that contain top-selling sports drinks. After soaking for up to 90 minutes, which the researchers said simulated sipping on the drinks throughout the day, the enamel coating of the teeth was partially eaten away. This allowed the drinks to leak into the bonelike material underneath the enamel, causing the teeth to soften and weaken.

There are many reasons not to drink "sugar water with dye", and this is another one.